Note: There are some uncountable nouns which we refer to in parts. When we do so, we use them with expressions such as piece of, a kilo of, etc. Here is a list of such expression:
a piece of chalk, a piece of information, a cake of soap, a piece of furniture, a block of ice, a loaf of bread, a piece of advice, a log of wood, etc.
These expressions have their plural forms: pieces of chalk, cakes of soap, etc.

IV. Concrete noun: A concrete noun refers to things with physical properties. This nouns can be sensed using one of our five senses. sight, hear, touch, smell, taste.
Examples: paper, sun, light, chair, people

Correct usage of Nouns:Rule 1: Some nouns are used only in the singular form. No plural form exists. But They may take a plural verb.Eg: advice, audience, furniture, justice, clothing, information, poetry, pains, scenery, machinery, majority, hair etc.

Examples:
They bought some new furnitures for the office ✘
They bought some new furniture for the office ✔

Poetries are read by the people ✘
Poetry is read by by the people ✔

The sceneries of the mountains are splendid ✘
The scenery of the mountains are splendid ✔

We have received no informations✘
We have received no information ✔ Her hairs are grey ✘
Her hair is grey ✔Rule 2: When a plural noun denotes a specific amount, length, weight quantity, etc. considered as a whole the verb must be in the singular form.Examples:
Three liters of water are too much for me to drink ✘
Three liters of water is too much for me to drink ✔ Five kilometers are not a long distance for a runner like you. ✘
Five kilometers is not a long distance for a runner like you. ✔

Rule 3: There are some nouns which are used only in the plural form and take only plural verb.
alms, billiards, gymnastics, premises, proceeds, scissors, tongs, forceps, spectacles, trousers, pantaloons, socks, shorts, bowels, intestines, biceps, genitals, riches, thanks, nuptials, outskirts, gallows, innings, doldrums, earnings etc.Examples:
The scissors has two parts ✘
The scissors have two parts ✔

His spectacles was broken ✘
His spectacles were broken ✔

His trousers is short ✘
His trousers are short ✔

The beggars were given alm✘
The beggars were given alms ✔

Rule 4: Some nouns have the same form for the plural as well as for the singular.aircraft, fruit, fish, sheep, species, deer, offspring, yoke etc.Example:
A large number of the fishes died due to the pollution of water ✘
A large number of the fish died due to the pollution of water ✔

The sheeps are grazing ✘
The sheep are grazing ✔

The wage of the worker is being paid ✘
The wages of the worker is being paid ✔

Rule 5: Some nouns which have got 's' at their end, but these are used as singular.Examples: news, statistics, mathematics, economics, physics, measles, mumps, ethics

Physics are very difficult to understand ✘
Physics is very difficult to understand ✔

The news of his death were received calmly ✘
The news of his death was received calmly ✔

Rule 6: The following nouns are always used in plural.
Examples: cattle, public, police, people
The police is moving fast ✘
The police are moving fast ✔

Rule 7: Material nouns are not used in plural forms
Example:
Ornaments are made of golds ✘
Ornaments are made of gold ✔

Rules Related to Possession:Rule 8: Apostrophe (') is never used with lifeless objects.
What is your book's price? ✘
What is the price of your book? ✔

Rule 9: We use ( 's) with certain dignified objects and abstract nouns
The duty's call, The sun's rays, the soul's delight, the river's bank, the earth's beauty, nature's bounty, the court's judgement, Heaven's will, truth's of triumph, fortune's favorite, day's journey
We give you back money for honesty sake ✘
We give you back money for honesty's sake ✔

Rule 11: When two or more nouns are joined by and, and a joint possession is meant, the possessive case will be formed by adding (‘s) to the last word.Examples:
Krishna and Kumar’s house is really beautiful.
Note: This sentence denotes that one house belongs to both Krishna and Kumar.

Rule 12:
When there are two nouns in apposition, the possessive case will be formed by adding (‘s) to the second noun.
Examples:
1. Einstein, the scientist’s equation changed theoretical physics
2. Kumar, the professor’s son, is very intelligent.

Rule 13:
The possessive case of a compound noun will be formed by adding (‘s) to the last word.
Examples:
Mother-in-law’s house
Commander-in-chief’s office